New NO donor ligands and complexes containing furfuryl or crown ether moiety: Syntheses, crystal structures and tautomerism in ortho-hydroxy substituted compounds as studied by UV–vis spectrophotometry

Şahin, Duygu; Koçoğlu, Serhat; Şener, Öznur; Şenol, Cemal; Dal, Hakan; Hökelek, Tuncer; Hayvalı, Zeliha

doi:10.1016/j.molstruc.2015.09.004

Cited by 8 publications

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“…The electronic spectrum of these macrocyclic ligands shows two bands in the region of 214–328 nm which denote (π → π*) and (n → π*) transitions of carbonyl groups and aromatic rings, respectively in Fig. 3 (Sahin et al 2015 ). The UV–visible spectrum of complexes [Co(TAML 1 )Cl 2 ]- [Co(TAML 3 )Cl 2 ] shows two absorption bands at 312–321 nm and 412–430 nm (Table 4 ), these bands are visible in the cobalt (II) complex’s electronic spectra, and their positions resemble those of distorted octahedral geometry and the D 4h symmetry (Omar and Mohamed 2005 ) and they were reasonably assigned to 4 T 1g (F) → 4 T 2g (F) and 4 T 1g (F) → 4 A 2g (F) transitions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, structural characterization, thermal analysis, DFT, biocidal evaluation and molecular docking studies of amide-based Co(II) complexes

et al. 2023

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Many distinct amino acid and aromatic amine-derived transition metal complexes are used as physiologically active compounds. A few Cobalt (II) complexes have been synthesized by reacting cobalt (II) chloride with 1, 8-diaminonapthalene-based tetraamide macrocyclic ligands in an ethanolic media. These synthesized ligands (TAML 1-3 ) and associated Co(II) complexes were fully characterized with various spectroscopic techniques, such as IR, NMR, CHN analysis, EPR, molar conductance, and magnetic susceptibility measurements, TGA, UV–visible spectra, powder X-ray diffraction and DFT analysis. The IR spectra reveal interactions between the core metal atom and ligands through N of 1, 8-diaminonapthalene. The distorted octahedral geometry of synthesized Co(II) macrocyclic complexes were confirmed by ESR, UV–Vis and DFT studies. The synthesized ligands (TAML 1 -TAML 3 ) and their Co(II) complexes were tested for antimicrobial activity against A. niger, C. albicans, and F. oxysporum in addition to bacteria like S. aureus, B. subtilis, and Gram-negative bacteria like E. coli. The ligand TAML 1 and complex [Co(TAML 1 )Cl 2 ] showed an excellent antibacterial activity. The minimum inhibitory concentration of TAML 1 and [Co(TAML 1 )Cl 2 ] against S. aureus were found to be 7 mm and 10 mm zone of inhibition at 500 ppm, respectively, compared to drug ampicillin (3 mm). Additionally, each molecule exhibited notable antioxidant activity. The biological significance of the synthesized compounds was then evaluated by molecular docking experiments with the active site of the receptor protein such as Sars-Cov-2 , C. Albicans, X. campestris and E. coli . The molecular docking assisted data strongly correlated to the experimental approach of antimicrobial activity. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11696-023-02843-y.

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Section: Resultsmentioning

confidence: 99%